This can be done using a lambda, like so:
button = Tk.Button(master=frame, text='press', command= lambda: action(someNumber))
This is a simple way to bind the argument without an explicit wrapper method or modifying the original action.
Top answer 1 of 14
426
This can be done using a lambda, like so:
button = Tk.Button(master=frame, text='press', command= lambda: action(someNumber))
This is a simple way to bind the argument without an explicit wrapper method or modifying the original action.
2 of 14
161
This can also be done by using partial from the standard library functools, like this:
from functools import partial
#(...)
action_with_arg = partial(action, arg)
button = Tk.Button(master=frame, text='press', command=action_with_arg)
GeeksforGeeks
geeksforgeeks.org › python › how-to-pass-arguments-to-tkinter-button-command
How to Pass Arguments to Tkinter Button Command? - GeeksforGeeks
July 23, 2025 - # importing tkinter import tkinter as tk # defining function def func(args): print(args) # create root window root = tk.Tk() # root window title and dimension root.title("Welcome to GeekForGeeks") root.geometry("380x400") # creating button btn = tk.Button(root, text="Press", command=lambda: func("See this worked!")) btn.pack() # running the main loop root.mainloop()
How to use a Tkinter button (call a function) that has an argument?
You can do this with lambda or partial. But not in this case, because you've misdignosed the problem. You need to make the entry an instance variable, then you will be able to access it from the method without passing it. class newTopLevel(object): def __init__(self, root): self.newWindow = Toplevel(root) self.entry_1 = tk.Entry(self.newWindow) # <==change here self.entry_1.grid(row=0, column=1) self.newWindow.btn = tk.Button(self.newWindow,text='Enter',command=self.fun) self.newWindow.btn.grid(row=0,column=2) def fun(self): get_value=self.entry_1.get() More on reddit.com
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November 20, 2020How to call same function with different argument given from list in tkinter button command option
from tkinter import * def fun(nm): msg= 'hello {}'.format(nm) print(msg) master=Tk(className="testing") list=[1,2,3,4] for x in list: para=x Button(master, text=x, command=lambda:fun(x)).pack(side='left') master.mainloop() getting output hello 4 every time More on discuss.python.org
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November 8, 2019Passing variables into Tkinter button click event
SOLVED: Mutable vs nonmutable data types. Python passes arrays by reference, but array elements only by value. If I were passing in a single variable, this would have worked. command = lambda a = idx: BtnClicked( array[a] , a)) was changed to command = lambda a = idx: BtnClicked( array[a],a , a))d BtnClicked definition was also changed to now take in the index of the array, so now it is working as desired. def BtnClicked(obj,idx, value): obj[idx] = value More on reddit.com
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January 29, 2024Tkinter button command using lambda to call a class method - how???
command=self.open_notebook will work, and is a better than using lambda in my opinion. You also need to move most of the code under def __init__ rather than where it is. class MainWidget: def __init__(self): root = Tk() root.geometry("400x400") search_frame = Frame(root) search_frame.pack() self.search_function = SearchFunction(search_frame) open_notebook_button = Button(root, text="Open", command=self.open_notebook) open_notebook_button.pack() root.mainloop() def open_notebook(self): self.search_function.get_emp_id() # and more stuff to add later More on reddit.com
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September 11, 2022Videos
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Using button functions with arguments in tkinter - YouTube
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How to pass arguments to a Button command in Tkinter? - YouTube
Python Tutorial
pythontutorial.net › home › tkinter tutorial › tkinter command binding
Tkinter Command Binding - Python Tutorial
April 3, 2025 - When you click a button, the lambda expression associated with the button’s command will execute. It’ll be called the select() function with a string argument.
Reddit
reddit.com › r/learnpython › how to use a tkinter button (call a function) that has an argument?
r/learnpython on Reddit: How to use a Tkinter button (call a function) that has an argument?
November 20, 2020 -
Hello everyone,
I have a Tkinter window that is defined in a class, and I have a function that gets a value from the Tkinter window.
I.E.
class newTopLevel(object):
def __init__(self, root):
self.newWindow = Toplevel(root)
entry_1 = tk.Entry(self.newWindow).grid(row=0, column=1)
self.newWindow.btn = tk.Button(self.newWindow,text='Enter',command=self.fun)
self.newWindow.btn.grid(row=0,column=2)
def fun(self):
get_value=entry_1.get()The issue here is entry_1 is not defined in my function. I normally don't have my Tkinter within a class, thus its a global and its properties (such as buttons and entry grids) are globals and they don't have to be defined. However in this case, now it does need to defined. I tried this:
def fun(self,entry_1):
get_value=entry_1.get()However, then I cannot use the button command to call it.
self.newWindow.btn = tk.Button(self.newWindow,text='Enter',command=self.fun(entry_1))
If I don't include the argument entry_1, then I'll get an error that fun has an argument and I haven't given any when using the button. I don't quite know how to use a Tkinter button that has arguments. Any help would be greatly appreciated!
Top answer 1 of 3
2
You can do this with lambda or partial. But not in this case, because you've misdignosed the problem. You need to make the entry an instance variable, then you will be able to access it from the method without passing it. class newTopLevel(object): def __init__(self, root): self.newWindow = Toplevel(root) self.entry_1 = tk.Entry(self.newWindow) # <==change here self.entry_1.grid(row=0, column=1) self.newWindow.btn = tk.Button(self.newWindow,text='Enter',command=self.fun) self.newWindow.btn.grid(row=0,column=2) def fun(self): get_value=self.entry_1.get()
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Use lambdas for passing arguments
Tutorialspoint
tutorialspoint.com › python › tk_button.htm
Tkinter Button
from tkinter import * from tkinter import messagebox top = Tk() top.geometry("100x100") def helloCallBack(): msg=messagebox.showinfo( "Hello Python", "Hello World") B = Button(top, text ="Hello", command = helloCallBack) B.place(x=50,y=50) top.mainloop() When the above code is executed, it produces the following result − ·
DaniWeb
daniweb.com › programming › software-development › threads › 166751 › tkinter-button-widget-passing-parameter-to-function
python - tkinter button widget - passing parameter ... [SOLVED] | DaniWeb
January 7, 2009 - A Tkinter button’s command must be a callable you pass by reference. Writing command=getCond(item) calls the function immediately; instead, build a callable that remembers the argument.
AIMosta
aimosta.com › Blogt › blogt-15.html
The Button Command with Parameters
Now, to define the property command of the button (the function that will be called), we will use lambda that will be equal to the call of the changeColor function with our button as a parameter.
Python Forum
python-forum.io › thread-35506.html
Button 'command' Argument Confusion
November 10, 2021 - I am confused by the 'command' argument for buttons. I have the following button defined: submitButton=tk.Button(top,text='Submit',command=submitData(top)).grid(row=rw,column=2,pady=5,sticky=tk.W)The command (submitData) is being executed immediately...
Python Programming
pythonprogramming.net › passing-functions-parameters-tkinter-using-lambda
Passing functions with Parameters in Tkinter using Lambda
Next, here's our new StartPage, with an added button: class StartPage(tk.Frame): def __init__(self, parent, controller): tk.Frame.__init__(self,parent) label = tk.Label(self, text="Start Page", font=LARGE_FONT) label.pack(pady=10,padx=10) button = tk.Button(self, text="Visit Page 1", command=lambda: qf("Check me out, I'm passing vars!")) button.pack()
Python Tutorial
pythontutorial.net › home › tkinter tutorial › tkinter button
Tkinter Button - Python Tutorial
April 3, 2025 - This is called the command binding in Tkinter. ... The master is the parent widget on which you place the button. The **kw is one or more keyword arguments you use to change the appearance and behaviors of the button.
TutorialsPoint
tutorialspoint.com › passing-arguments-to-a-tkinter-button-command
Passing arguments to a Tkinter button command
August 5, 2021 - # Import the required library from tkinter import * from tkinter import ttk from tkinter import messagebox # Create an instance of tkinter frame win=Tk() # Set the geometry win.geometry("700x250") # Define a function to update the entry widget def update_name(name): entry.insert(END, ""+str(name)) # Create an entry widget entry=Entry(win, width=35, font=('Calibri 15')) entry.pack() b=ttk.Button(win, text="Insert", command=lambda:update_name("Tutorialspoint")) b.pack(pady=30) win.mainloop() Running the above code will display a window with an Entry widget and a button to insert text in it.
Eddie Jackson
eddiejackson.net › wp
Python – Pass Argument to a Button Command in Tkinter – Lab Core | The Lab of MrNetTek
import tkinter as tk import webbrowser # FUNCTION def openURL(x): new = 2 webbrowser.open(x,new=new) # FORM SETUP root = tk.Tk() root.geometry("350x300")# X Y root.resizable(0,0) root.title("") # button button = tk.Button(root, text='Google Search', width=25, command= lambda: openURL("http://google.com")) button.pack() root.mainloop()
Delft Stack
delftstack.com › home › howto › python tkinter › how to pass arguments to tkinter button command
How to Pass Arguments to Tkinter Button Command | Delft Stack
February 2, 2024 - button = tk.Button(app, text="Press Me", command=action(args)) We will introduce two ways to pass the arguments to the command function. As demonstrated in Python Tkinter tutorial, you have the option to use the partial object from the functools module.
Python.org
discuss.python.org › python help
How to call same function with different argument given from list in tkinter button command option - Python Help - Discussions on Python.org
November 8, 2019 - from tkinter import * def fun(nm): msg= 'hello {}'.format(nm) print(msg) master=Tk(className="testing") list=[1,2,3,4] for x in list: para=x Button(master, text=x, command=lambda:fun(x)).pack(side='left') master.mainloop() getting output hello 4 every time
ThisCodeWorks
thiscodeworks.com › python-how-to-pass-arguments-to-a-button-command-in-tkinter-stack-overflow-python › 61cc18b444c79c0015e8c15b
python - How to pass arguments to a Button command in Tkinter? - Stack Overflow | thiscodeWorks
another method to pass args in function without invoking fucntion https://stackoverflow.com/questions/6920302/how-to-pass-arguments-to-a-button-command-in-tkinter
TutorialsPoint
tutorialspoint.com › how-can-i-pass-arguments-to-tkinter-button-s-callback-command
How can I pass arguments to Tkinter button's callback command?
We will pass the label as the argument in the button command by using lambda function. #Import necessary Library from tkinter import * from tkinter import ttk #Create an instance of tkinter window win= Tk() #Set the geometry of tkinter window win.geometry("750x250") #Define the function to ...
CodeSpeedy
codespeedy.com › home › how to pass arguments to a button command in tkinter
How to pass arguments to a Button command in Tkinter - CodeSpeedy
January 22, 2022 - #import libraries from tkinter import * #creating a function to call by button def display(args): print(args) #Creating tkinter object tkobj = Tk() #setting dimensions tkobj.title("Codespeedy") tkobj.geometry("400x400") #Creating button bt = Button(tkobj,text="Click me",command=lambda: display("Welcome to codespeedy!!"),pady=100) bt.pack() #looping tkobj.mainloop()
Medium
medium.com › @BetterEverything › pass-arguments-to-button-command-stylish-guis-with-python-customtkinter-6-5a160143cf1d
Pass Arguments to Button Command - Stylish GUIs with Python CustomTkinter #6 | by Better Everything | Medium
August 13, 2024 - Learn to add buttons to a Python GUI and connect them to functions. And also learn to pass arguments to those button command functions.
sqlpey
sqlpey.com › python › tkinter-button-command-arguments-techniques
Tkinter Button Command Arguments: Techniques for Passing Data to Callbacks
October 29, 2025 - from functools import partial import ... tk.Frame(root) main_frame.pack() arg1, arg2, arg3 = 5, 10, 3 # Create the partial object operation_with_args = partial(target_operation, arg1, arg2, arg3) # Assign the partial object to the command action_btn = tk.Button(main_frame, text='Run ...
Reddit
reddit.com › r/learnpython › passing variables into tkinter button click event
r/learnpython on Reddit: Passing variables into Tkinter button click event
January 29, 2024 -
I'm close, but I think I'm missing something fundamental.
I'm programatically building some tkinter buttons and trying to get them to set a variable to some value (in this case, their own array index).
from tkinter import *
btnarray = [] array = []
def BtnClicked(obj, value):
obj = value
def CreateWindow():
for idx in range(10):
array.append(0)
btnarray.append(Button(root, text = f"Button {idx}", command = lambda a = idx: BtnClicked( array[a] , a)))
btnarray[-1].pack()
root = Tk()
CreateWindow()
while True:
root.update() structure is representative of the application I inherited and am trying to alter. Why isn't it writing the values to array? if I break inside 'BtnClicked', obj gets the value written, but that somehow doesn't pass back to array.
Thanks!